diff options
| author | Phil Sutter <phil@nwl.cc> | 2020-10-27 17:33:15 +0100 |
|---|---|---|
| committer | Phil Sutter <phil@nwl.cc> | 2020-11-04 14:44:11 +0100 |
| commit | 25338cdb6c77aa2f0977afbbb612571c9d325213 (patch) | |
| tree | e18d5b58d9718ebb9ee21cb06f189eb94bf7a22c /tests/py/ip/ct.t.payload | |
| parent | 8a927c56d83ed0f78785011bd92a53edc25a0ca0 (diff) | |
src: Optimize prefix matches on byte-boundaries
If a prefix expression's length is on a byte-boundary, it is sufficient
to just reduce the length passed to "cmp" expression. No need for
explicit bitwise modification of data on LHS. The relevant code is
already there, used for string prefix matches. There is one exception
though, namely zero-length prefixes: Kernel doesn't accept zero-length
"cmp" expressions, so keep them in the old code-path for now.
This patch depends upon the previous one to correctly parse odd-sized
payload matches but has to extend support for non-payload LHS as well.
In practice, this is needed for "ct" expressions as they allow matching
against IP address prefixes, too.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Diffstat (limited to 'tests/py/ip/ct.t.payload')
| -rw-r--r-- | tests/py/ip/ct.t.payload | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/tests/py/ip/ct.t.payload b/tests/py/ip/ct.t.payload index d5faed4c..a7e08f98 100644 --- a/tests/py/ip/ct.t.payload +++ b/tests/py/ip/ct.t.payload @@ -21,25 +21,21 @@ ip test-ip4 output # ct original ip saddr 192.168.1.0/24 ip test-ip4 output [ ct load src_ip => reg 1 , dir original ] - [ bitwise reg 1 = (reg=1 & 0x00ffffff ) ^ 0x00000000 ] [ cmp eq reg 1 0x0001a8c0 ] # ct reply ip saddr 192.168.1.0/24 ip test-ip4 output [ ct load src_ip => reg 1 , dir reply ] - [ bitwise reg 1 = (reg=1 & 0x00ffffff ) ^ 0x00000000 ] [ cmp eq reg 1 0x0001a8c0 ] # ct original ip daddr 192.168.1.0/24 ip test-ip4 output [ ct load dst_ip => reg 1 , dir original ] - [ bitwise reg 1 = (reg=1 & 0x00ffffff ) ^ 0x00000000 ] [ cmp eq reg 1 0x0001a8c0 ] # ct reply ip daddr 192.168.1.0/24 ip test-ip4 output [ ct load dst_ip => reg 1 , dir reply ] - [ bitwise reg 1 = (reg=1 & 0x00ffffff ) ^ 0x00000000 ] [ cmp eq reg 1 0x0001a8c0 ] # ct l3proto ipv4 |